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([2a10:a5c0:800d:dd00:8fdf:935a:2c85:d703]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-54fc644fafdsm2565109e87.51.2025.05.15.02.28.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 15 May 2025 02:28:44 -0700 (PDT) Message-ID: Date: Thu, 15 May 2025 12:28:43 +0300 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 9/9] arm64: dts: imx8mn-bsh-smm-s2-common: Disable PMIC SNVS reset target state To: Dario Binacchi , linux-kernel@vger.kernel.org Cc: Simon Holesch , Karthikdatt Anantharamrao , michael@amarulasolutions.com, linux-amarula@amarulasolutions.com, Wolfgang Birkner , Conor Dooley , Fabio Estevam , Krzysztof Kozlowski , Pengutronix Kernel Team , Rob Herring , Sascha Hauer , Shawn Guo , devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org References: <20250514082507.1983849-1-dario.binacchi@amarulasolutions.com> <20250514082507.1983849-10-dario.binacchi@amarulasolutions.com> Content-Language: en-US, en-AU, en-GB, en-BW From: Matti Vaittinen In-Reply-To: <20250514082507.1983849-10-dario.binacchi@amarulasolutions.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250515_022847_377207_A6C01AD8 X-CRM114-Status: GOOD ( 14.77 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 14/05/2025 11:25, Dario Binacchi wrote: > From: Wolfgang Birkner > > VDD_DRAM was disabled on standby, therefore the reference hardware did not > wake up reliable. Use PMIC reset target state READY instead of SNVS, to > keep VDD_DRAM active during standby. There is something I'm not quite sure I understand. Lookin at the BD71847 data-sheet, the VDD_DRAM is OFF at READY. (Page 27, Table 3-8. Voltage Rails ON/OFF for Respective Power State) https://fscdn.rohm.com/en/products/databook/datasheet/ic/power/switching_regulator_system/bd71847amwv-e.pdf Please, explain. Yours, -- Matti > > Signed-off-by: Wolfgang Birkner > Signed-off-by: Dario Binacchi > > --- > > arch/arm64/boot/dts/freescale/imx8mn-bsh-smm-s2-common.dtsi | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/arch/arm64/boot/dts/freescale/imx8mn-bsh-smm-s2-common.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-bsh-smm-s2-common.dtsi > index ea8d741c6904..633874b3bf66 100644 > --- a/arch/arm64/boot/dts/freescale/imx8mn-bsh-smm-s2-common.dtsi > +++ b/arch/arm64/boot/dts/freescale/imx8mn-bsh-smm-s2-common.dtsi > @@ -94,7 +94,6 @@ bd71847: pmic@4b { > pinctrl-0 = <&pinctrl_pmic>; > interrupt-parent = <&gpio1>; > interrupts = <3 IRQ_TYPE_LEVEL_LOW>; > - rohm,reset-snvs-powered; > > #clock-cells = <0>; > clocks = <&osc_32k>;